Gravel-colter attachment for road-graders



(No Model.)

W. L. OAVERLEY. GRAVEL GOLTER ATTACHMENT FOR ROAD GRADERS.

w W w t HH N level the road "and perform the work in a satshowing theattachment fitted thereto.

shown inthe accompanying drawings, in

TNITED STATES VILLIAM L. CAVERLEY, OF HAlV CREEK, MISSOURI.

GRAVEL-COLTER ATTACHMENT F'OR-R'OAD-GRADERS.

SPECIFICATION forming part of Letters Iiatent No. 588,554, dated August24, 1897.

Application filed June 10,1896.

To all whom it mcty concern;

Be it known that I, WILLIAM L. CAVERLEY, a citizen of the United States,residing at Haw Creek, in the county of Pike and State of Missouri, haveinvented a new and useful Gravel-Colter Attachment for Road-Grad ers, ofwhich the following is a specification.

In operating road scrapingand grading machineryover stony and hardsurfaces great difficulty is experienced in causing the share or bladeto take hold and perform the required work. This is due to the conditionof the road-surface, which resists the 'penetration of the bladeto suchan extent as to remove a small portion sufficient to level and provide asmooth and even bed or surface.

The purpose of the present invention is the construction of anattachment which can be applied to a road scraper or grader of ordinaryconstruction and which can be interchangeably used in connection withthe ordinary share or blade, said. attachment being constructed withespecial reference to penee. trating hard and stony surfaces andloosening the same, whereby when the ordinary share or blade is placedin position itwill isfactory manner and as rapidly as if the surface ofthe road were comparatively soft and susceptible to the action of theshare or blade.

The improvement consists, essentially, of a beam or block provided withcolters and adapted to replace the usual share or blade when equippingthe machine for operation; upon stony and hard-surfaced roads.

For a full understanding of the merits and advantages of the inventionreference is to be had to the accompanying drawings and the followingdescription.

The improvement is susceptible of various changes in the form,proportion, and the minor details of construction without departing fromthe principle or sacrificing any of. the advantages thereof, and to afull disclosure of the invention an adaptation thereof is which- Figure1 is a detail view of a road-machine, Fig. 2 is a detail view of theattachment. Fig. 3

.in-the accompanying drawings forms no part of the presentin vention adescription thereof is not deemed necessary. Suffice it. to say that theordinary share or blade is removed and the attachment placed inposition.

The improvement consists of a beam or block 1 of proper dimensions,according to the nature of the work to be performed and the character ofthe machine for which the device is designed. Colters 2 are applied tothe beam or block and are reduced and sharpened at their lower ends, soas to penetrate the surface of the road and loosen the same forthesubsequent action of the share or blade. n I

The colters are comparatively thin and wide and increase inthicknessfromtheir front to I their rear edges, soas'to present a wedgeshapedappearance in cross-section. These colters are placed with their wideedges against the beam, so as to obtain suflicient purchase topreventthe turning of the colters when themachine is in operation. Byhaving the colters gradually increasing in thickness from their front'totheir rear edges a broad bearing is secured against the beam and thecolters are-strengthened, s0 as to enable them to resist the straint'ovwhich they will be subjected when in service. Moreover, the front edgesare narrOW the'reby enabling the points of the colters to. betterpenetrate the hard surface of a road-bed. Suitable clips or fastenings 3are employed for adj ustably and removably connecting the colters withthe beam or block. These clipspas shown most clearly in Fig. 3, havetheir side members diverging to correspondwith theinclination of thesides of the colters, so as to grip the same by a wedging action whendrawn up tightly, thereby preventing the colters from slipping whenforced down upon the road to machine.

When the surface of the road is stony or hard and not capable of readilyyielding to the ordinary share or blade, the latter is removed andsubstituted by the attachment, which is applied to the standards orparts 5, to which the usual blade is fitted. The attachment being inposition, as shown in Fig. 1 of the drawings, the machiueis drawn overthe road in the ordinary manner and the active ends of the colterspenetrating the surface will loosen the latter and prepare the same forthe subsequent action of the blade. After the stony and hard surface hasbeen prepared and loosened the attachment is replaced by the share orblade and the machine is again drawn over the road, thereby leveling,smoothing, and otherwise preparing it, as may be required.

beam with the operating mechanism of the V road-machine, a series ofsimilarly-formed cutting-tools braced against the front side of thebeam, and having their lower ends bent forward and their body portionsof uniform dimensions throughout their length,and made thin and wide andwedge-shaped in cross-section, with their wider edges placed against theaforesaid beam, and clips having their side members diverging to conformto the inclined sides of the cutting-tools to grip them by a wedgingaction and admit of each having an independent vertical adjustment,substantially in the manner set forth for the p urpose specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

WILLIAM L. CAVERLEY.

IVitn esses:

J. G. GAsH, W. S; \VORSHAM

